#!/usr/bin/env python3.7
# vim:fileencoding=utf-8
# License: GPL v3 Copyright: 2019, Kovid Goyal <kovid at kovidgoyal.net>

from __future__ import absolute_import, division, print_function, unicode_literals

import os
import shutil
import unittest

from lxml import etree

from calibre.ebooks.oeb.polish.parsing import parse_html5
from calibre.ptempfile import PersistentTemporaryDirectory
from calibre.utils.hyphenation.dictionaries import (
    dictionary_name_for_locale, get_cache_path, is_cache_up_to_date,
    path_to_dictionary
)
from calibre.utils.hyphenation.hyphenate import (
    add_soft_hyphens, add_soft_hyphens_to_html, add_soft_hyphens_to_words,
    dictionary_for_locale
)


class TestHyphenation(unittest.TestCase):

    ae = unittest.TestCase.assertEqual

    def setUp(self):
        tdir = PersistentTemporaryDirectory()
        path_to_dictionary.cache_dir = tdir
        dictionary_name_for_locale.cache_clear()
        dictionary_for_locale.cache_clear()
        get_cache_path.cache_clear()
        is_cache_up_to_date.updated = False

    def tearDown(self):
        dictionary_name_for_locale.cache_clear()
        dictionary_for_locale.cache_clear()
        get_cache_path.cache_clear()
        is_cache_up_to_date.updated = False
        try:
            shutil.rmtree(path_to_dictionary.cache_dir)
        except EnvironmentError:
            pass
        path_to_dictionary.cache_dir = None

    def test_locale_to_hyphen_dictionary(self):

        def t(x, expected=None):
            self.ae(
                dictionary_name_for_locale(x),
                'hyph_{}.dic'.format(expected) if expected else None
            )

        t('en', 'en_US')
        t('en_IN', 'en_GB')
        t('de', 'de_DE')
        t('es', 'es_ANY')
        t('nl', 'nl_NL')
        t('fr', 'fr')
        t('XXX')

        cache = [False]

        def cache_callback():
            cache[0] = True

        dp = path_to_dictionary(dictionary_name_for_locale('en'), cache_callback)
        self.assertTrue(
            os.path.exists(dp), 'The dictionary {} does not exist'.format(dp)
        )
        self.assertTrue(cache[0])
        cache[0] = False
        self.assertTrue(
            os.path.exists(path_to_dictionary(dictionary_name_for_locale('es'), cache_callback))
        )
        self.assertFalse(cache[0])

    def test_add_soft_hyphens(self):
        def t(word, expected):
            self.ae(add_soft_hyphens(word, dictionary, '='), expected)

        dictionary = dictionary_for_locale('hu')
        t('asszonnyal', 'asszonnyal')

        dictionary = dictionary_for_locale('en')
        t('beautiful', 'beau=ti=ful')
        t('BeauTiful', 'Beau=Ti=ful')

        def w(words, expected):
            self.ae(add_soft_hyphens_to_words(words, dictionary, '='), expected)

        w(' A\n beautiful  day. ', ' A\n beau=ti=ful  day. ')

    def test_hyphenate_html(self):
        root = parse_html5('''
<p>beautiful, <span lang="sv"><!-- x -->tillata\n<span lang="en">Expand</span></span> "latitude!''',
        line_numbers=False)
        add_soft_hyphens_to_html(root, hyphen_char='=')
        raw = etree.tostring(root, method='text', encoding='unicode')
        self.ae(raw, 'beau=ti=ful, tilla=ta\nEx=pand "lat=i=tude!')


def find_tests():
    return unittest.defaultTestLoader.loadTestsFromTestCase(TestHyphenation)
